<template>
  <div>
       <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
        <!-- 2.准备容器 -->
        <div id="main" style="width: 750px;height: 400px"> </div>
    </el-card>
  </div>
</template>

<script>
// 1.导入echarts
import echarts from 'echarts';  
import _ from 'lodash'
export default {
    data() {
        return {
            // 需要合并的数据
            options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
            }
        }
    },
    // 3.此时页面上的元素已经被渲染完毕
   async mounted(){
     var myChart = echarts.init(document.getElementById('main'));
    //  4.准备数据
     const {data:res} = await this.$http.get('reports/type/1')
     if(res.meta.status !== 200){
         return this.$message.error('获取折线图数据失败！')
     }
     const result = _.merge(res.data,this.options)
            //   5.展示数据
        myChart.setOption(result)
    }
}
</script>

<style>

</style>